https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79224
--- Comment #19 from Aldy Hernandez <aldyh at gcc dot gnu.org> --- In my sandbox I see no discernible difference between GCC 6 and current mainline (r256265). I am testing with: ./xgcc -B./ -O3 -ffast-math -funroll-loops -march=core-avx2 -lm c-ray-f.c cat ~/scene | ./a.out -s 5000x4000 >/dev/null The numbers for GCC 6 and mainline are pretty close. I ran each version 4 times on a Linux box under runlevel 3 (no X). The average is: Mainline: 5048 milliseconds GCC 6: 5059 milliseconds I am testing on: Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz If y'all agree with my tests, should we close this PR?